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jgenesis vs bsnes: catalog facts
jgenesis	bsnes
Free Free to download from GitHub.	Free The open-source emulator is available without a license fee.
Windows, Linux, Web	Windows, macOS, Linux
Several Sega consoles plus the SNES in one emulator Runs in a browser through WebAssembly	HD Mode 7 and run-ahead give a visibly better result than a plain emulator Low-level emulation of enhancement chips rather than high-level shortcuts
macOS is not officially supported Smaller project than the established multi-system emulators	Accuracy mode is demanding on older hardware Development has been community-maintained since the original author's death
Downloadable app, Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.